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U251. Clark felt that his _____ in one of the most dramatic medical experiments of all time was worth the suffering he underwent. A. appreciation B. participation C. presentation D. apprehension 请根据需要填入 Script: 正确答案：B 得分：2 分 52. By _______computation, he estimated that the repairs on the house would cost him a thousand dollars. A. coarse B. rude C. rough D. crude 请根据需要填入 Script: 正确答案：C 得分：2 分 53. A ___ woman wouldn't weep just because her husband had forgotten her birthday. A. reasonable B. rational C. unreasonable D. irrational 请根据需要填入 Script: 正确答案：B 得分：0 分 54. Agriculture was a step in human progress _______ which subsequently there was not anything comparable until our own machine age. A. in B. for C. to D. from 请根据需要填入 Script: 正确答案：C 得分：0 分 55. In Britain people _____________ four million tons of potatoes every year. A. consume B. dispose C. swallow D. exhaust 请根据需要填入 Script: 正确答案：A 得分：0 分